Water-heater.



F. RBISSNEE & H. J. WARREN.

WATER HEATER.

APPLICATION FILED MAY1B,1905.

Patented June 27, 1911.

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m E realm? FREDERICK REISSNER AN 1) HENRY J. WARREN,

OF STAMFORD, CONNECTICUT, ASSIGN- OBS TO STAMFORD GAS STOVE COMPANY, OF STAMFORD, CONNECTICUT.

WATER-HEATER.

To all whom it may concern:

Be it known that We, FREDERICK REISSNER and HENRY J. WARREN, citizens of the United States, residing at Stamford, in the county of F airfield and State of Connecticut, have invented certain new and useful Improvements in VVater-Heaters; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

Our invention relates to water heaters and has for its object to produce a heater of simple construction and eflicient operation particularly adapted for heating water in a closed boiler for household use and for other similar purposes. Its important features are the arrangement of a coil pipe or a double coil pipe, to which the water is admitted from the lower portion of the boiler, to be heated during its upward flow, and thence delivered to the top of the boiler, or directly to the fixtures in the house, where by a large surface of pipe is exposed to be heated from the heat of a burner arranged immediately beneath the coil in a. peculiar casing or shell. A supplementary coil or combination return-pipe may be arranged within the main coils and we prefer to use the peculiar valve herein described.

A desirable embodiment of our invention is shown in the drawing herewith, in which the reference letters and numerals of the specification indicate the corresponding parts in all the figures.

Figure I is a vertical section of our invention connected to a boiler with the coils shown in elevation. Fig. II is a vertical section with a compound supplementary return-pipe shown in the interior of the coils. Figs. III and IV are cross sections through the main valve with the valve shown in different ositions. Fig. V is a section of a union or connecting the ends of the coils and of the straight pipes. Fig. VI is a plan of the valve and Fig. VII a projection thereof, showing the arrangement of the holes.

1 indicates a boiler, 2 the external supply pipe thereto, 3 the feed pipe from the bottom of the boiler to the union 4, to which is fitted the main valve 5.

6 is the upright pipe connected to said union and carrying at its upper end the Specification of Letters Patent.

Application filed May 19, 1905.

Patented June 27, 1911. Serial No. 261,224.

main coils 8 and 9, which are connected at their upper ends to the outlet 10, through which the heated Water flows back to the top of the boiler, 01' directly to the fixtures through the house supply pipe 12. The coils are inclosed and protected within the outer shell, or casing, 15, into which the air passes down through opening 16 around chimney 17 of the inner shell or jacket 18 and around the jacket to the bottom openings 20, thence around the burner 23 and through its central opening, by which the heated air and the products of combustion are carried up through and around the coils, thoroughly heating them in all parts, and thence out through the chimney.

The burner 23 may be of any suitable form, but is desirably a flat gas burner, of which 2-1 is the gas supply pipe having an enlargement or mixing chamber 2:") for the thorough mixture of the gas with the air admitted throu h openings 26, fitted with adjustable slide valve 27, whereby the size of the openings may be regulated to admit the correct amount of air in proportion to the quality and pressure of the gas in each particular locality. This slide may easily be secured in position by screw 28 and easily readjusted.

Valve 5,fitted to correspondingly formed seat in union 4, is preferably of the tapering form shown in Fig. VI, and is provided with holes a, b, 0, arranged as shown. In Fig. III is shown what may be called the normal position of the valve, in which the water passes through holes a and Z) to the upright pipe and coils and back to the boiler. The hole a should be large enough so that, as flow through hole I) is cut off, a slow flow from pipe 3 through hole a to pipe 6 is permitted, and as the turn of the valve is continued, and pipe 3 is cut off, a slow flow, or trickle, begins through the tip of hole 0 to nozzle 30, which permits hot water to be drawn slowly and directly from the coils. The division between holes a and 7) must be narrower than the internal diameter of pipe 6, so immediately on the flow to pipe 6 through hole I; ceasing such flow will begin through edge of hole a. The described arrangement of holes permits some flow of Water in any position of the valve and avoids danger of burning out the coils. Holes a and b might be one continuous slot; but generally it is easier to drill them separately. When hole a registers with pipe 6, hole 0 will register with nozzle 30, and the coils may be flushed, to remove sediment, etc.

As many main coils as desirable may be used but two are sufficient, giving sufficient heating surface; to add other coils would be expensive and would crowd the parts. These two coils may be secured by right and left threads at their lower ends into the union 35 secured on the upper end of the upright pipe 6 and at their upper ends in a similar union 35 on the lower end of the outlet. These unions may be closed at their adjacent ends as shown in case of upper union in Fig. II, or a suitable pipe 38 may be secured to said ends, thus giving extra heating surface, and bracing the coils. When a straight pipe 38 is so used as shown in Fig. I it must be partially closed by any suitable means as by choke ring 39, shown in Fig. V, to choke the flow of water there through and force it topass around through the coils also.

Where desired an inner compound returnpipe may be arranged within the coils through which the water first passes whereby it is superheated. This compound return-pipe may be arranged as best shown in Fig. II, where 41, 41 indicate small side pipes connected to the upper end of the upright pipe 6, through which the water flows upwardly and thence through holes cl into the compound return-pipe 42, and thence into the lower ends of the coils secured to the lower end of said compound return-pipe.

43 indicates an extension on the outer shell arranged to inclose the air inlets to the burner, whereby the air is heated before it is mixed with the gas and the combustion thereby improved.

4A is a plate, desirably of refractory, nonconductin material, whereby the draft and outflow o heated products is checked, and the interior heat increased. A plate of such material also becomes superheated.

45 is a lining to the outer casing of any suitable non-conducting material, for instance asbestos.

While we have shown and described our heater in connection with a house boiler, yet we do not desire to limit it to such use, but to protect all uses and all modifications thereof.

Having thus described our invention, what we claim as new and desire to secure by Letters Patent, is z-- 1. In a water heater, the combination with an outer casing having an air inlet in its top, of an inner jacket arranged within the casing and having air inlets in its lower portion communicating with the casing and an outlet from its upper portion to the outer air, a water heating coil arranged entirely within the casing, supply and discharge pipes for the water connected respectively to the lower and upper ends of said coil, a gas burner arranged entirely within the jacket below the coil and a gas supply pipe for the burner.

2. In a water heater the combination with an outer sheet metal shell having an opening in its upper end for the air supply, a sheet metal jacket arranged within the shell, and having a chimney at its top extending outwardly through the shell and openings in its lower portion to receive the air from the shell, two water heating coil pipes connected by unions at their upper and lower ends and arranged longitudinall within the jacket, a feed pipe extending inwardly through the lower wall of the shell and connected with said coil pipes at their lower ends, and an outlet pipe extending outwardly through the jacket and the shell and connected to the coil pipes at their upper ends.

3. In a water heater, the combination with an outer shell having an opening in its upper end for the admission of the air supply, a closed jacket arranged within the shell, and having an opening in its lower portion to admit the air from the outer shell and a chimney in its top opening outwardly through the outer shell, two coiled pipes arranged in said jacket one within the other, a supply pipe for the admission of water connected to said coiled pipes at their lower ends, an outlet connected to said coiled pipes at their upper ends, a gas burner arranged within the jacket below the coil and means to supply air and gas to the burner.

4. In a water heater, the combination with an outer shell having an openin in its upper ehd for the air supply, a jacket arranged within the shell, and having a chimney at its top extending outwardly through the shell and openings in its lower portion to receive the air from the shell, two coiled ipes connected by unions at their up er and ower ends and arran ed longitudinally within the jacket, a fee pipe extending inwardly through the bottom of the shell and connected with said coiled pipes at their lower ends, and an outlet pipe extending outwardly through the jacket and shell and connected to said coiled pipes at their upper ends, and a supplementary pipe arranged within the coils and forming a direct connection between the u per and lower ends of said coils, said supp ementary pipe being provided with a contracted portion to impede the direct flow of water therethrou h, a gas burner arranged within the shell eneath the coils, means to en ply gas and air to the burner, and a baflie p ate arranged in the jacket above the coils to check the draft.

5. In a water heater, the combination with a suitable shell, of a coil pi e or pipes arranged within the shell, a flied water pipe connected to the lower end of the coil, an outlet connected to the upper end of the coil, a supplementary pipe arranged within the coil and forming a direct connection between the upper and lower ends of the coil, said supplementary pipe being provided with a contracted portion to impede the flow of water therethrough, and a heating means arranged beneath the coil.

6. In a water heater, the combination with a suitable shell, of two coiled pipes arranged within said shell, said coils belng of different diameters and the smaller arranged within the outer, upper and lower unions connected to said pipes at their upper and lower ends respectively, a feed water pipe connected to said lower union, an outlet connected to the upper union, a supplementary pipe arranged within the coils and forming a direct connection between the upper and lower ends of the two coils for the direct upward flow of a portion of the. water and heating means arranged in the shell below the coils.

7. In a water heater, the combination with an outer shell having an opening in its upper end for the air supply, a jacket arranged within the shell, and havino a chimney at its top extending outwardfy through the shell and openings in its lower portion to receive the air from the shell, two coiled pipes connected b unions at their upper and lower ends an arranged longitudinally within the jacket, :1 feed pipe extending inwardly through the bottom of the shell and connected with said lower union, an outletextending outwardly throu h the jacket and shell and connected to said upper union, a supplementary pipe arranged Within the coils and forming a direct connection between said upper and lower unions, a gas burner arranged within the shell beneath the coils, and means to supply gas and air to the burner.

8. In a water heater, the combination with an outer shell having an opening in its upper end for the admission of the air supply a closed jacket arranged within the she I, and having an opening in its lower portion to admit the air from the outer shell and a chimney in its top opening outwardly through the outer shell, a coiled pipe or pipes arranged in said jacket, a supply pipe for the admission of water connected to said pipe at its lower end, an outlet connected to said pie at its upper end, a gas burner arranged within the jacket below the coil, means to supply air and gas to the burner, and a batlie plate arranged in the jacket above the coil to check the draft.

9. In a water heater provided with coiled pipes for receiving the water to be heated, the combination therewith of a feed pipe for supplying water to the coils, a union in said feed pipe, said union having inflow and outflow openings and a third or waste opening, an outlet connected to the coils, a threeway valve fitted to the union and having a larger hole, a smaller hole and a third hole having a contracted portion, a division between the larger an smaller holes being less than the outflow openings, and the holes otherwise being so proportioned and arranged that in any position of the valve there is a greater or less flow of water.

In testimony whereof we aflix our signatures in presence of two witnesses.

FREDERICK REISSNER. HENRY J. \VARREN.

Copies 01 this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. O. 

